[VOTE][RESULT] Move Spark Connect server to builtin package (Client API layer stays external)

[Hyukjin Kwon]

The vote passes with +21s (12 binding +1s).

(* = binding)
+1:
Hyukjin Kwon (*)
Denny Lee
Cheng Pan
Holden Karau (*)
Martin Grund
Kent Yao
Bo Yang
Xinrong Meng (*)
Takuya Ueshin (*)
Matthew Powers
Dongjoon Hyun (*)
Liang-Chi Hsieh (*)
Reynold Xin (*)
Gengliang Wang (*)
Jungtaek Lim
Wenchen Fan (*)
Chao Sun (*)
John Zhuge
Peter Toth
Herman van Hovell (*)
Huaxin Gao (*)

+0: None

-1: None

Thanks all.